I tried to account for how they function in present-day Magic, so historically powerful sorceries that dont see much play anymore didnt make the list
While not strictly ramp, it thins your deck and is much more likely to trigger when you have multiple opponents
Similarly, each time a Horror creature, Nightmare creature, enchantment creature, or face-down creature you control attacks an opponent, that opponent become afraid of you for the rest of the turn, regardless of what happens to the creature that attacked
But more spoilers have appeared, and we now know there's a named -1/-1 mechanic, Blight
That includes gold like Windreaver, hybrid like Judge's Familiar, split like Protect // Serve, or aftermath like Farm // Market